<!DOCTYPE html>
<html >
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script>
        // 一般写函数
    
    </script>
</head>
<body>
    ererrerre
    <div>
        ssdsdsdsds
        <p>sdsdfsfs</p>
    </div>

    <script>
        // 一般写执行语句
        debugger
        document.write("12121121")
    </script>
</body>
</html>